Rear brake pads literally blue??

AREESSMILL · May 10, 2009

Just taken off the rear brake pads and the pads are a bluey oily colour, is this signs of overheating?

If so is it down to the rear brake lever not having sufficient play in it?

When i turn the wheel by hand on the paddock stand it tends to grind a bit.

:dunno

New pads and new discs or just new pads

r896neo · May 10, 2009

It sounds like maybe your piston is seized up or at least stiff. First off i'd say service your caliper and make sure the pistons are moving freely. You should be able to easily push them back in by hand and if you can't then take the pads out and put something like a thick pencil in between them to stop them popping right out and then pump them most of the way out. Scrub the surfaces with an old toothbrush and brake cleaner then grease the pistons lightly with silicone (or any rubber safe) grease. Take the glaze off your pads with fine wet and dry and refit the lot. You'd only need to consider a new disc if its warped which you'd feel as a rythmic judder when using the brake.

amb67 · May 10, 2009

LOL Piccies please Tim!!

1-0 to AMB67 :doug

r896neo · May 10, 2009

oh and also clean the pin that the pads slide on well as this can cause the pads to bind if they are rusted or crudded to it.

Bear1 · May 10, 2009

Make sure youve got enough free play in the lever.
Not long after getting mine the rear brake kept sticking and it was down to not enough free play at the lever. Cos the master cylinder is bolted to the engine it makes the fluid expand and if theres not enough free play to take up the expansion it will put the brakes on for you

AREESSMILL · May 10, 2009

Done all the above put copper slip on the backs of the pads cleaned the pin etc. but it still sounds as if it graunching somewhere when i spin the rear wheel over.

I have 3 or 4 mm left on the pads.

Any ideas?

ps I would take some pics Alan but I need to delete the piccies of your missus first as I havent any room on the SD card.

:doug

danf1234 · May 10, 2009

AREESSMILL said:
Done all the above put copper slip on the backs of the pads cleaned the pin etc. but it still sounds as if it graunching somewhere when i spin the rear wheel over.

I have 3 or 4 mm left on the pads.

Any ideas?

ps I would take some pics Alan but I need to delete the piccies of your missus first as I havent any room on the SD card.

:doug

Good Comment LOL!

AREESSMILL · May 10, 2009

danf1234 said:
Good Comment LOL!

errr Im not joking

irate

:doug

A303 · May 10, 2009

AREESSMILL said:
Just taken off the rear brake pads and the pads are a bluey colour, is this signs of overheating?

No Tim, they're the special OZ pads they use in the R.:nana

AREESSMILL · May 10, 2009

A303 said:
No Tim, they're the special OZ pads they use in the R.:nana

Well ive cleaned em up like you said by using 15/50 oil now so their fine

:doug

Badger · May 10, 2009

You have not enough free play in the rod that goes into the M/C, adjust it so it is giving more free play, this is the rod that you see at the bottom of the brake lever, when you press the brake lever it pushes into the M/C, you need to adjust the rod and move it back slightly towards the rear of the bike, you clearance is not enough, this will allow the brake to bind slightly and then cause heat and expansion which will be causing your brake to be on when riding, it may well expand enough to bring you to a grinding halt if you dont attend to it:thumbup

Wolf · May 10, 2009

Badger said:
it may well expand enough to bring you to a grinding halt if you dont attend to it:thumbup

i can vouch for that...

as for the pads being a little blue / always grinding a little i seem to have the same thing on mine, has always been like that even after servicing the calliper and replacing the pads etc :dunno

Kevp · May 11, 2009

I had my rear brake lock up totally once.

In France wasnt even using it, but after a ride up some mountain range the brake locked on. Couldnt move it at all. We had to lift the bike off the road. Wait for it to cool down, remove the caliper. The wiring loom melted as did the plastic on the brake hose.

All was replaced under warantee, but not to good when your stuck in the middle of the road and cant move the thing.

So its best to have too much play, than not enough.

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Rear brake pads literally blue??

AREESSMILL

r896neo

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